This International Standard specifies a titrimetric method, after dis illation, for the determination of total nitrogen in sulfuric acid and oleums for industrial use. The method is applicable to products with a total nitrogen content equal to or greater than 0.05% (m/m).
NBN T 03-019-1979 history
1979NBN T 03-019-1979 Sulphuric acid and oleum for industrial use - Determination of total nitrogen content - Titrimetric method after distillation